Earlier quoted context omitted.
So which hip languages are these "thought leaders" using now?
Python, Ruby, Javascript, JVM-hosted languages like Clojure, Scala, and newer languages still in development like Elixir, I'm sure I'm missing some. Haskell is perpetually 10 years ahead in programming research but sadly it functionally lacks support for day-to-day scripting tasks.
"Thought leaders" are hopefully just using the best language suited for the job. It often comes down to what kind of code you are writing and what it needs to run on.